OFFSET
1,1
COMMENTS
Column 3 of A217028
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 33*a(n-1) -2152*a(n-3) +3498*a(n-4) +26598*a(n-5) -55952*a(n-6) +44616*a(n-8) -17576*a(n-9) for n>10
EXAMPLE
Some solutions for n=3 (movement: 0=n 1=e 2=s 3=w)
..1..1..2....1..1..2....2..2..3....1..3..2....1..1..2....2..1..3....1..2..3
..2..3..3....0..2..3....2..3..0....0..1..3....1..0..2....0..1..2....2..2..0
..0..1..3....0..0..0....1..3..3....0..0..3....1..3..3....0..3..3....0..3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 24 2012
STATUS
approved